Найди произведения чисел упрощая записи:
62·12 35·25 14·15 19·19 41·23 12·55 13·63 38·21 27·17
62·12 35·25 14·15 19·19 41·23 12·55 13·63 38·21 27·17
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62*12=62*10+62*2=620+124=74435*25=35*20+35*5=35*20+30*5+5*5=700+150+25=875
14*15=14*10+14*5=140+10*5+4*5=140+50+20=210
19*19=19*10+19*9=190+10*9+9*9=190+90+81=361
41*23=41*20+41*3=820+123=943
12*55=55*10+55*2=550+110=660
13*63=63*10+63*3=630+60*3+3*3=630+180+9=819
38*21=38*20+38*1=760+38=798
27*17=27*10+27*7=270+20*7+7*7=270+140+49=459